74171972 has 48 divisors (see below), whose sum is σ = 157731840. Its totient is φ = 29810592.

The previous prime is 74171971. The next prime is 74172001. The reversal of 74171972 is 27917147.

74171972 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (38).

74171972 is strictly pandigital in base 9.

It is not an unprimeable number, because it can be changed into a prime (74171971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56273 + ... + 57575.

It is an arithmetic number, because the mean of its divisors is an integer number (3286080).

Almost surely, 2^74171972 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74171972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78865920).

74171972 is an abundant number, since it is smaller than the sum of its proper divisors (83559868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

74171972 is a wasteful number, since it uses less digits than its factorization.

74171972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440 (or 1438 counting only the distinct ones).

The product of its digits is 24696, while the sum is 38.

The square root of 74171972 is about 8612.3151358970. The cubic root of 74171972 is about 420.1586173377.

The spelling of 74171972 in words is "seventy-four million, one hundred seventy-one thousand, nine hundred seventy-two".